Hey people! I'm 'Lazer Cut' I thought that after having played this game for so long(at least over 250 hours), I'd join the forums. Currently I'm working on a SSTO spaceplane design that I in vain try to get to go on interplanetary travels WITHOUT refueling(hopeless case, added docking port now). Other than that, I've made a lifter with 90t of capacity, a rover craft I've successfully landed on Eve(and mun) and a space station/ship(2 jumbo's with 4 nuclear engines). Is it possible at all to make a spaceplane that can takeoff from Kerbin and land on, lets say Duna, without refueling? My best design had like 1200 deltaV after getting into orbit and that's far from enough(i use mechjeb and Kerbal engineer mod, rest stock) Lastly, is there any news on when KSP is going to get optimized? really, I hate flying 500+ parts ships at 5 fps q_q(especially since I got a heavy gaming rig)